When the toner cartridge is totally empty:
The status LED turns red on and the display screen shows the error message of replacing toner.
The machine stops printing and incoming faxes are saved in memory.
However, when the toner cartridge is empty, but you can still print black-and-white print jobs (The submitted job must be in black and white).
Check the type of the toner cartridge for your machine (see Ordering supplies and accessories).
At this stage, the toner cartridge needs to be replaced. Be sure to prepare new toner cartridge in advance (see Ordering supplies and accessories). How to replace the toner cartridge (see Replacing the toner cartridge).
When the imaging unit is totally empty:
The status LED turns red on and the display screen shows the error message of replacing imaging unit.
Check the type of the imaging unit for your machine (Ordering supplies and accessories).
At this stage, the imaging unit needs to be replaced. Be sure to prepare a new imaging unit in advance (see Ordering supplies and accessories). How to replace the imaging unit (see Replacing the imaging unit ).
When the toner cartridge is near the end of its life:
White streaks or light printing occurs.
Toner low related message appears on the display.
The LED blinks red.
If this happens, you can temporarily improve print quality by redistributing the remaining toner in the cartridge. In some cases, white streaks or light printing will still occur even after you have redistributed the toner. How to redistribute the toner (see Redistributing toner).